Emil xottosch



E. KGTTUSCH.

PISTON RING.

APPUCATION FILED 9mm, i918.

,Putffllml Nm'. 2.5, 1012).

.UN frED erwies ,PATENT formes, i

EMIL KOTTUSCH, OF DETROIT, MICHIGAN.

PISTON-BING.

Toall- 'w/ om, 'it may concern:

Be it known that I,`EM1L Kor'rUsoH, a citizen of the United States, and a resident of Detroit, in the county of lV-ayne and State of Michigan, have invented new and useful Improvements in Piston-Rings, of which the following is a specification.

This invention relates to piston rings particularly adapted to be used in connection with internal combustion enginesl although not restricted in use to internal combustion engines.

An important object of the invention is to-providc a piston ringr of the above named class which possesses sufficiently uniform elasticity and resiliency to insure. a perfect seal betweenthe two 'ends of a piston operating within a cylinder.

A further object of the invention is to pro,- vide in a ring of the above named class a means whereby all `noise or chattering of the ring when fitted into the chase of a ypiston is entirelyeliminated.

A further object ot' the invention is to provide a ring of the above named class which is cheap to manufacture and highl)y effective' in use.

"Other objects and advantages of the invention will be apparent from the fiillowing description taken in connection with the accompanying drawings.

-In the drawings, forming a part of this specification and in which like numerals are employed to designate like parts throughout. the same,

Figure 1 is a perspective view of a piston 'ring embodying the preferred form of my invention,

Fig. 2 is a side elevation of the same.

Fig. 3 is asimilar view to Fig. 2, the tongues being shown 4in contact with each other,

Fig. 4 is a sectional view taken on line. 4--4 of Fig.' 2, and,

` Fig. 5 is a plan View of a piston ring embodying a modified form of .my invention.

-ln-the drawings. attention being called to Figs.l l to 4 inclusive` wherein is shown the preferred 'fof'm of my invention, thennmeral 5 indiclites an annular ring of resilient metal having upper and lower faces 6 and 7 which are machined to provide uniformly smooth surfaces. Thering 5 is split. as shown at 8 to provide overlapping tongues 9 which are.

normallyA spaced. preferably a thirty-second of an meh. from each other. The ends of Specieatian of Letters Patent.

t e 'rin 5, the area of which mating faces is equa to the area of the ends of the over- Patented Nov. 25, 1919.

Application led October 29, 1918. Serial No. 280,179.

lapping tongues 9. I wish to emphasize here" the fact-,that the thickness of each of the overlapping tongues is equal to one-half Athe thickness of the ring 5. it is therefore ob.- vious that since the overlapping tongues-9 are each in thickness equa-l to one-half the thickness of the ring `5 they are in thickr'i'ess".

equal to each other.

secon'd'of an inch, apart 4the distance between the faces 6 and 7' of the tongues 9 is necessarily greater than vthe thickness of the rin '5 by that fraction of an inch which is equalr to the space normally afforded be tween the tongues 9.

It will benoted when considering lpartie'- ace 6 is spaced from the line formed at 'the Since the combined 1 thickness of the overlapping arms 9 `is'eqiifl to 4the thickness of the ring 5- and 'thegz'nilrxs 9 are normally spaced, preferably one thirty- -ularlyf Figs. 2 und 4 that the plane o f'the intersection of the plane o'f the face 6 and the plane of the adjacent matingiacelt),l

which space is equal to the, space aiforded between the-overlapping tongues 9, und like wise the plane of the face 7 is spliced from the line formed at the intersection ofthe plane of the face 7 and the adjacent mating face"10. which space is equal to the space formed between the overlapping tongues. In placing a piston, havingthe ring emoodymg cylinder the ring is (liircumferentially coin- 'no vmy invention associated therewith, into a pressed, which circumferential compression is permitted due to the space aforded tween the ends o the tongues Sl end the matI- ing faces 10.` The ring. due to its resiliency.

will, upon being inserted into the cylinder,

oircumferentially expend. The tongues 9 of the ring are moved to the position shownin Fig. 3 when the ring is placed into the chase of the piston and due to the tendency ofthe overlapping tongues to separete 'from each other andv assume the posit-ion shown in Fig. 2. the ring as a whole, due to the engagement of the feces 6 end 7 of the tongues 9 with the walls of the chase, is held firmly in position upon the piston. During the. compression stroke, or the working stroke of the piston the tendency of the tongues 9 to separate vfrom each other is overcome by the pressure set up 'within-the cylinder in which instance the tongues 9 are .i gagexnent with' the Walls o f the cylinder and gethe'r as shown in Fig. 3 whenever there is forced firmly together. Sinceby the circumferential expansion the perlphery of the ring is maintained at all times firmly 1n ensmce'the tongues 9 are pressed'irml toa pressure exerted within the cylinder an absolute gas tight jointure is formed between the ends of the piston within the cylinder.

` In considering Fig. 5, wherein is shown a modified form of my invention, it `need onlybe stated that the ring is substantially the same as that'herenbefore described exclosed 'in my cept the vtongues 9 aremade to equal substantially one-half the" circumference ofthe ring rather than substantially a third of the -nular ring is split longitudinally `and cut' radially'to pi'ovide the overlappingl tongues 9, the space between the tongues being substantially e ual to the', savior other suitable .element to splitrtlie ring longitudinally.

' The ton es are then, by any suitable means,

clam t ether so that their inner surface 'Wll proper y contactwith each other, whereupon the r isgrund or finished to. -pro- -L'vide'afsmoxcit surface on each side thereof,

i .the finishing being done while the tongues are clamped togethel It necessarily' follows that willen-the tongues'are released from' en- .,4'( Fgagement with' each other :they will be, as a 1 .result ofthe ref-iiliency off-the metal, septo provide the openings between the tongues 9 9. In grinding or finishing the ring whilethe tongues are clamped together care is taken to. so grind the-opposite sides of the ring as to provide tongues 'having equal breadth and thickness throughout their length, which tongueshave a total cross-sectional area of the unsplit portion of the ring.

lt is to be understood that various changes'in the shape, size and arrangement of 'parts may be resorted' to without depart; ing from the spirit of my inventionor the scope of the subjoined claim.

Having thus described my invention, what I claim as new and desire to secure a-nclprotect by Letters `Patent of the United States,'is: l p l A piston ring comprising an annularbody split to provide mating faces and a pair =of overlapping resilient tongues normally spaced apart to more intimately engage the walls of the .chase .than the unsplit or solid portion of the rin the resiliency of said l 'tongues bei-ng suicient to firmly -retain the tongues in engagement with the wallsoff'the piston chase. whereby rattling and excessive rotative movement er1-,the ring withinthe -chase during the operation "of the pistons prevented, said tongues being' adapted to en- -170 gage each other throughout the length; of

each when plressure is axially exerted upon the ring wit in a.eylinder,the smallest cross sectional area of the tongues being -e ual to the smallest cross sectional'area-'of t eunsplit portion of the ring-each to e having a uniform breadth and thiclniessn-olroughont its-length, the tongues being provided with end sfaces. normally spaced-from Said mating faces and adapted to abut said mating faces when' the ringI is circumferetially compressed within a cylinder.

AEMIL KoT'rUson. 

